Everfine LT- 101A - Chapter 7 Verification; Verification Conditions

LT-101A User’s Manual
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Chapter 7 Verification
7.1 Verification conditions
(1) Ambient temperature: 23℃±5℃
(2) Relative humidity: 30%~75%R.H.
(3) Power supply: 220V±11V
(4) Frequency: 50Hz±1Hz
(5) Preheating time: ≥30min
(6) No mechanical vibration and electromagnetic interference during the test
7.2 Verification equipments
(1) Power source (0V~600V, 0A~10A, the stability should be better than 0.03%，
DC&AC10Hz ~ 10kHz).
(2) High accuracy power meter (0V~600V, 0A~10A, the accuracy should be
better than 0.05%).
(3) All the equipments should be eligible in the periodical calibration.
7.3 Items and methods
7.3.1 Items verified
(1) The accuracy of the voltage, frequency, current and active power of DC &
20Hz~65Hz in input channel.
(2) The accuracy of the voltage, frequency, current and active power of DC &
20Hz~65Hz in output channel.
7.3.2 Methods
(1) Connection
The connection for the verification of the input test channel of the instrument is
shown as Fig.7.1, thick line shows current connection of the test channel while the